Invincibility:
Enter LRGARMS as a code.
Level select:
Enter PASSKEY as a code.
Level skip:
Enter QUITER as a code.
All combos:
Enter NINJA as a code.
All weapons:
Enter STRAPPED as a code.
Maximum ammunition:
Enter MRJUAREZ as a code.
Maximum damage:
Enter SPINACH as a code.
Extra health:
Enter BUTTERUP as a code.
Play as Clown:
Enter SCARYCLOWN as a code.
Play as Convict:
Enter JAILBREAK as a code.
Play as GI:
Enter GNRLINFANTRY as a code.
Play as Lizard:
Enter HISSSS as a code.
Play as Moseley:
Enter BIGLIPS as a code.
Play as Nara:
Enter WEIGHTGAIN as a code.
Play as Nikki:
Enter HAIRLOSS as a code.
Play as Robot:
Enter MRROBOTO as a code.
Play as Superhero:
Enter SUPERJOHN as a code.
Play as Zombie:
Enter IAMSODEAD as a code.
Free aim:
Enter FPSSTYLE as a code.
Pain arenas:
Enter MAXIMUMHURT as a code.
Armor:
Enter STEELUP as a code.
Baseball bat:
Enter SLUGGER as a code.
Rag doll:
Enter CLUMSY as a code.
Slow motion button:
Enter SLIZOMIZO as a code.
Bouncy men:
Enter BOUNZMEN as a code.
Cluttered locations:
Enter CLUTZ as a code.
Dramatic finish:
Enter STYLIN as a code.
Ending sequence:
Enter WIMP as a code.
Concept art:
Enter SKETCHPAD as a code.
All FMV sequences:
Enter DIRECTOR as a code.
Do not select:
Enter DONOTSEL as a code.